I read the duplicate post and it mentions that the reason is that the same network was used by users to spam Stack Overflow. I can understand that and it is good that Stack Overflow does this.

However, should Stack Overflow be blocking users from updating answers? The abuse block makes sense, because users should not post spam. But is it needed to block updates as well? I don't understand why we block updates, because spam user won't just post spam and update it. They just keep posting spam everywhere. According to me, Stack Overflow should be blocking just new posts.

Are there any other reasons to block users with spam IP from updating answers?

1 Answer
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Kinda necessary, yeah - a surprisingly common technique for spammers is to post something apparently innocuous and then come back later and edit it into spam. Heck, some of 'em have gotten all fancy and use text-generators trained on existing answers to compose their initial posts.

You seem decent enough, what with coming here to meta to talk to us & all. So I've unblocked your network - it may get blocked again if folks start doing dodgy stuff, but a bit more participation, & you'll be immune to these blocks anyway. So, y'know, just don't do anything dodgy.